// Copyright (c) 2015-2016, ETH Zurich, Wyss Zurich, Zurich Eye
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the ETH Zurich, Wyss Zurich, Zurich Eye nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL ETH Zurich, Wyss Zurich, Zurich Eye BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#pragma once

#include <sys/stat.h>
#include <string>
#include <fstream>

#include <ze/common/string_utils.hpp>

//! @file path_utils.hpp
//! Utilities to check whether a path or file exists or to join paths.
//! @todo: replace with std/boost::filesystem.
namespace ze {

inline bool fileExists(const std::string& filename)
{
  std::ifstream infile(filename);
  return infile.good();
}

inline bool isDir(const std::string& filename)
{
  struct stat buf;
  if(0 == stat(filename.c_str(), &buf))
  {
    return S_ISDIR(buf.st_mode);
  }
  return false;
}

inline std::string joinPath(const std::string& s1, const std::string& s2)
{
  return std::string(ensureRightSlash(s1) + ensureNoLeftSlash(s2));
}

inline std::string joinPath(const std::string& s1, const std::string& s2,
                            const std::string& s3)
{
  return joinPath(joinPath(s1, s2), s3);
}

inline std::string joinPath(const std::string& s1, const std::string& s2,
                            const std::string& s3, const std::string& s4)
{
  return joinPath(joinPath(s1, s2), joinPath(s3, s4));
}

inline std::string getFileName(const std::string& path)
{
  return path.substr(path.find_last_of('/') + 1);
}

} // namespace ze
